Dyestuffs of the anthraquinone series



2,848,462 Patented Aug. 19, 1 958 2,848,462 DYESTUFFS OF THE ANTHRAQUINONE SERIES Ernst Gutzwiller, deceased, late of Basel, Switzerland, by

Jenny Gutzwiller-Markees, administratrix, Basel,SWitzerland, and Hans Brunner, Basel, Switzerland, assignors, by mesne assignments to Saul & Co., Newark,

J., as nominee of Fidelity Union Trust Company, executive trustee under Sandoz Trust No Drawing. Application March 30, 1955 Serial No. 498,100

Claims priority, application Switzerland October 31, 1950 8 Claims. (Cl. 260-378) I II Y wherein each of X and one Y stands for the same radical of the formula in which m is one of the integers and 8, and the other Y is hydrogen.

These new dyestuffs are obtained by reacting anthraquinone compounds which contain replaceable substituents in the 1- and 5- or in the land 8-positions, with aliphatic amines which contain 5- or 8 carbon atoms.

The object of the invention is also realized by the dyestutf compositions obtained by heating in a solvent medium a mixture of substantially equal parts of an amine of the formula in which m is one of the integers 5 and 8, and of an amine of the formula in which n is one of the integers 5, 6, 7 and 8, with an aminatable anthraquinone derivative corresponding to the formula wherein each of a and one b is a substituent which is reactable by metathesis with the said amines whereby the said substituents are eliminated and of the formulae in which m and rr have the precedingly-indicatedsignificances, and the other b is hydrogen. 1

Suitable anthraquinone compounds which contain replaceable substituents in the 1,5- or 1,8-positions comprise inter alia, for example, 1,5- and 1,8-dihydroxy-anthraquinones, 1,5- and 1,8-dimethoxy-anthraquinones, 1,5-

replaced by radicals 'and 1,8 dichloro-anthraquinones, 1,5-"and 1,-8-dibronioanthraquinones, 1,5- and l,S-rdillltl'O-illlthlfiQllll'lOllBS, 1,5- and 1,8-nitro-chloro-anthraquinones, the 1,5- and 1,8- nitro-anthraquinone-monsulfonic acids, the 1,5- and 1,8- chloro-anthraquinone-monosulfonic acids, and the 1,5- and 1,8-anthraquinone-disulfonic acids or their salts.

Aliphatic amines, suitable for the preparation of the dyestuffs and dyestuff compositions, comprise, for example, l-aminopentane, l-amino-l-methyl-butane, l-aminol-methyl-l-methyl-propane, l-aminooctane and l-amino- 2-ethyl-hexane or mixtures thereof, and, for thepreparation of the dyestuff compositionsonly, the mixtures of these amines with, for example, l-aminohexane and 1- aminoheptane. v

The reaction is preferably carried out in an excess of the aliphatic amine itself or in a solvent, .such'as water, alcohol, phenol, pyridine or the like, in an open or closed vessel at elevated temperature, preferably in the range between 60 and 150 C.,. and optionally in the presence of an acid-binding agent, such for example asan alkali metal carbonate or acetate, and of a-suitablecatalyst, such for example as copper powder and/ or a copper salt.

In case an amine is reacted with an alkali metal salt of' an anthraquinone-disulfonic acid, according to the present invention, the reaction is preferably carried out in aqueous solution and under raised pressure. In order to avoid side-reactions with the formed sulfite, it is advantageous to add an oxidizing agent such, for example, as potassium bromate, sodium chlorate, potassium chlorate, sodium nitrobenzenesulfonate or the like. In this case, the reaction temperature is preferably between and C.

The obtained dyestuffs are, in general, well crystallized substances of bronzy appearance, which possess in part an outstanding solubility in organic solvents, in fats, oils and benzines, mixtures of the dyestuffs frequently having especially goodsolubility. They are used for dyeing fats, oils, benzines and the like, as well as for dyeing nitrocellulose lacquers, spirit varnishes, synthetic resin lacquers, etc.

The following examples set forth representative exemplary embodiments of the invention, and these examples are intended to be solely illustrative and not at all limitative. In these examples, the parts and percentages are by weight and the temperatures are expressed in degrees Centigrade. 1 Example 1 55.4 parts of 1,5-dichloro-anthraquinone, 13 parts of sodium carbonate and 0.8 part of copper sulfate are stirred'for 16 hours at 95- l00 "C. in 150 parts of l-aminopentane. At the end of this time, thereaction is ended. The condensation mass is cooled to 20 and stirred into water. The dyestuff is filtered otf, washed with water and dried. It corresponds to the formula E) NH-C Hn-CHrGHz-OHa-CH and dissolves in benzene with orange-red coloration, and in concentrated sulfuric acid with weak yellow coloration, which turns blue upon addition of formaldehyde and after standing for a short time.

The same dyestufi is obtained if, in the preceding paragraph, the 1,S-dichloro-anthraquinone is replaced by an equivalent quantity of 1,S-dibromo-anthraquinone.

If the 1,5-dichloro-anthraquinone is replaced by an equivalent quantity of the 1,8-isomer, a dyestufi is obtained which corresponds to the formula HaC-HaC-HgC-HzC-HaC-HN (1) and dissolves in benzene with violet-red coloration, and in sulfuric acid with citron-yellow coloration, which turns green upon addition of formaldehyde. The same dyestufi is obtained, if the 1,8-dichloroanthraquinone is replaced by an equivalent quantity of 1-chloro-8-nitroanthraquinone.

Example 2 20.6 parts of the sodium salt of 1,5-anthraquinone-disulfonic acid, 25 parts of l-amino-l-methyl-butane and parts of sodium nitrobenzene sulfonate are heated to 140 for 19 hours in 120 parts of water in an autoclave. The thus-produced dyestuif is filtered off, washed with water and dried. It corresponds to the formula and is a crystalline powder which possesses properties similar to those of the product described in Example 1.

The same dyestuff is obtained if the sodium salt of 1,5-anthraquinone-disulfonic acid is replaced by an equivalent quantity of an alkali metal salt of l-nitro-anthraquinone-S-sulfonic acid or 1-chloro-anthraquinone-S-sulionic acid.

As oxidizing agent, the sodium nitrobenzene sulfonate can be replaced by a corresponding quantity of potassium bromate or sodium chlorate or potassium chlorate.

Example 3 20.6 parts of the sodium salt of 1,5-anthraquinonedisulfonic acid, parts of technical aminopentane and 15 parts of sodium nitrobenzene sulfonate are heated to for 19 hours in 120 parts of water in an autoclave. The resultant crystallized dyestuff is filtered off at 20 C., washed with water and dried. Recrystallized from alcohol, the thus-obtained 1,S-diamylamino-anthraquinone melts at 9596 C. It dissolves in benzene with orangered coloration and in concentrated sulfuric acid with weakly yellow coloration; upon addition of formaldehyde and after standing for a short time, the sulfuric acid solution turns blue.

NE-CHz-CHg-CHz-CHg-CH;

The dyestufi corresponds to the formula H11 0 a-EN In place of the 1,S-anthraquinonedisulfonate of the preceding paragraph, the 1,8-isomer can also be reacted with technical aminopentane.

The technical aminopentane used according to the present example, is a commercial aminopentane.

Example 4 Example 5 20.6 parts of the sodium salt of 1,5-anthraquinonedisulfonic acid, 25 parts of l-aminooctane and 15 parts of sodium nitrobenzene sulfonate are heated to C. for 19 hours in 120 parts of water in a closed vessel. After cooling to 20, the dyestufi, which corresponds to the formula is filtered ofli, washed with'cold water and dried. It is The same dyestulf is obtained when the sodium salt of purified by recrystallization from .anorganicsolvent, such 1,5-anthraquinone-disulfonic acid is replaced by 1,5-dias'alcohol or benzene.v It dissolves in benzine with a chloro-anthraquinone and this compound is heated with red coloratiom l-amino-Z-ethyl-hexane in the 'presence of an acid bind- Exam'ple 6 5 ing agent such as sodium acetate, sodium carbonate and g the like, and of a catalyst such as copper powder or a 20.6 parts of the sodium salt of 1,8-anthraquinone-dicopper salt. sulfonic acid, 25 parts of laminooctane and parts of sodium nitrobenzene sulfonate :are heated to 150- 155 I I C. for 19 hours in 120 parts of water in a closed vessel. 10 55.4 parts of 1,8-dichloro-anthraquinone, 150 parts of After cooling to 20, the dyestuff, which corresponds to l-amino-Z-ethyl-hexane, 13 parts of potassium acetate the formula v v and 0.5 part of copper sulfate are stirred for '16 hours at Example 8 is filtered off, washed with cold water and dried. It is ISO-140. At the end of this time the reaction is ended;

purified by recrystallization from an organic solvent, such A test specimen shows no deepening of color in alcohol as alcohol or benzene. It dissolves readily in benzine or benzene. The l-amino-Z-ethyl-hexane in excess is'rewith red coloration which is somewhat bluish as commoved from the reaction mass by distillation in vacuo. pared to the color of the solution of the corresponding a The residue of the distillation is dissolved in benzine, and 1,5-derivative. the solution is filtered off from insoluble by-products.

Example 7 After that the benzine is distilled ed by steam. When cooled a dark crystalline powder separates which, after 82.4 parts of the sodium salt of 1,5-anthraquinone-didrying, is soluble in organic solvents such as benzene, sulfonic acid, '62 parts of sodium nitrobenzene sulfonate acetone, benzine and the like. The solution of the dyeand parts of l-amino-Z-ethyl-hexane are heated to stulT in sulfuric acid isyellow; it turns greenish-blue upon for 24 hours in an autoclave. The thus-proaddition of formaldehyde. duced dyestufl. is filtered ofi, washed withwater and dried. The same dyestufi is obtained when, instead of 1,'8-di- It corresponds to the formula 40 chloro-anthraquinone, the sodium salt of 1,8-anthra- OHz-CH; f) NH-C'Hr- H-CHPCHPCHPCH1 H-c-mc-mc-mo-n o-md-n H e-H:

and dissoiv es inbenz'ene or benzine with orangered col quinone-disulfonic acid is heated to 140-150, in aqueoration, and in sulfuric acid with yellow-brown colorous solution and in the presence of an oxidizing agent ation, which turns blue upon addition of formaldehyde. 9 such as sodium nitrobenzene sulfonate, under raised pres- It crystallizes from acetone in bronzy yellow crystals, sure, with l -amino-Z-ethyl-hexane. which possess a very good solubility in organic solvents The dyestuff obtained according to both foregoing such as benzene, acetone, benzine and the like. paragraphs corresponds to the formula 7 8 Example 9 Example 11 20.6 parts of the sodium salt of 1,5-anthraquinone- 0.03 part of the dyestufi produced according to Examdisulfonic acid, 12.5 parts of l-amino-l-methyl-butane, ple 7 is dissolved in parts of a spirit lacquer by heat- 12.5 parts of l-aminohexane and 15 parts of sodium niing on a boiling water bath. The solutionis filtered and trobenzene sulfonate are heated to 145 for hours in 5 poured onto a substratum, for example a sheet of card- 100 parts of water in an autoclave. After cooling to board. After drying, a dyed film or coating of lacquer 20, the reaction product is filtered off, washed with wais obtained.

ter and dried. The so-obtained dyestufl is a mixture of Having thus disclosed the invention, what is claimed is:

the following products: 1. An anthraquinone dyestuff which corresponds to (11 CH; 10 formula H1C-H;CH;C-HC

wherein m is one of the integers 5 and 8, one Y stand! NH-CHr-CHa-CHx-OHr-CHr-CH:

HsC-HaC-HaO-HzC-HgO-HaC-HN and CH 0 NH-IH-GHr-CMCH:

Example 10 for a radical of the formula 20.6 parts of the sodium salt of 1.5-anthraquinone- C H disulfonic acid, 12.5 parts of l-amino-l-methyl-butane,

12.5 parts of l-aminooctane and 15 parts of sodium niin Which n is one of the inte 5 6 7 an 8 d trobenzene sulfonate are heated to 140-145 in 100 parts other Y is hydrogen. 8 s d an the of water in a closed vessel. Upon completion of the re- 2. An anthra uinone d estufi which con-es nds the action and after cooling the reaction product to 20, the formula, q y p0 to latter is filtered 01f, washed with water and dried. The so-obtained dyestufi is a mixture of the following three products: Y o Nix-ca OH: O NH-BF-CHPCH -CH:

H1C-H;O-HnC-HO-HN wherein one Y stands for H, and the other Y lttndl for 9 3- An anthraquinone dyestuif which corresponds to the 8. The dyestutf product obtained by heating in a sol formula vent medium a mixture of equal parts by weight of 1- Y NH oaHn amino-yl-methyl-butane and l-aminohexane with an aminatable anthraquinone derivative corresponding to the 5 formula 1 i wherein one Y stands for H, and the other Y stands for CBHH vi I y i 4. The anthraquinone dyestutf corresponding to th a Y formula I I I 'ein each Z is a substituent which reacts by metathesis 5. The anthraquinone dyestutf corresponding to the with the said amines whereby the said substituents are formula eliminated and replaced by residues of the said amines,

' which product consists of a mixture of (I) NH$H-CH2CHr-CH3 CH,

( Nn- H-CHr-CHI-CH HaC-HaC-HgO-HC-HN I HiCH2CHz0-HC-HN 6. The anthraquinone dyestutf corresponding to the Nn-om-cHr-cm-cm-cm-o H formula UHF-CHI f) NH-CHy-(EH-CHr-GHz-CHx-CH:

7. The anthraquinone dyestufi corresponding to the formula References Cited in the file of this patent UNITED STATES PATENTS 2,050,661 Koeberle et a1 Aug. 11, 1936 2,205,191 Flaks June 18, 1940 2,211,943 Wilder Aug. 20, 1940 2,426,577 Scalera et a1. Aug. 26. 1947 FOREIGN PATENTS 22,128 Great Britain Oct. 2, 1902 UNITED STATES PATENT OFFICE Certificate of Correction Patent No. 2,848,462 August 19, 1958 Ernst Gutzwiller, deceased, by Jenny Gutzwiller-Markees, administratrix It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2, Example 1, the upper right-hand portion of the formula should appear as shown below instead of as in the patent:

column 4, Example 5, the upper right-hand portion of the formula should appear as shown below instead of as in the patent:

IIIHCHz-OHr-CHz-CHg-CHz-CHr-CHrCH:

Signed and sealed this 14th day of April 1959.

Attest= KARL H. AXLINE, ROBERT C. WATSON, Attestz'ng Oficer. G'ommissz'oner of Patents. 

1. AN ANTHRAQUINONE DYESTUFF WHICH CORRESPONDS TO THE FORMULA 